A Dual case setup is 2.28x2.28 = 5.2:1 which is lower then just a single case with aftermarket gears.
BigMike, this is a
observation, but I want to hold you to the same standard as you do Advanced Adapters. In your comparison you note that the AA case is really 4.97:1 rather than the 5.0:1 that they advertise. 2.28x2.28 = 5.198:1...ok I will accept 5.2:1 as technically correct, I failed to notice the third decimal.
There is no question that the Marlin gears, case or any other product are superior to the competition. I have a single 4.70:1 case and it can be a pain to back up in low range, but it has never been a problem on the trail. It almost takes as long to shift it twice as it does to just backup.
What are you, or did you, take in school? You knowledge is amazing and I'm curious about your background.